ASoC: soc-acpi: move link_slaves_found()

Move existing function in common library to make sure the code can be
reused by other SoC vendors.

No functionality change outside of the move and added prefix.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230731213242.434594-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/linux/soundwire/sdw.h

@@ -482,6 +482,11 @@ struct sdw_slave_id {
 	__u8 sdw_version:4;
 };
 
+struct sdw_extended_slave_id {
+	int link_id;
+	struct sdw_slave_id id;
+};
+
 /*
  * Helper macros to extract the MIPI-defined IDs
  *

include/linux/soundwire/sdw_intel.h

@@ -264,11 +264,6 @@ struct sdw_intel_link_dev;
  */
 #define SDW_INTEL_CLK_STOP_BUS_RESET		BIT(3)
 
-struct sdw_intel_slave_id {
-	int link_id;
-	struct sdw_slave_id id;
-};
-
 struct hdac_bus;
 
 /**
@@ -298,7 +293,7 @@ struct sdw_intel_ctx {
 	int num_slaves;
 	acpi_handle handle;
 	struct sdw_intel_link_dev **ldev;
-	struct sdw_intel_slave_id *ids;
+	struct sdw_extended_slave_id *ids;
 	struct list_head link_list;
 	struct mutex shim_lock; /* lock for access to shared SHIM registers */
 	u32 shim_mask;

include/sound/soc-acpi.h

@@ -9,6 +9,7 @@
 #include <linux/stddef.h>
 #include <linux/acpi.h>
 #include <linux/mod_devicetable.h>
+#include <linux/soundwire/sdw.h>
 
 struct snd_soc_acpi_package_context {
 	char *name;           /* package name */
@@ -208,4 +209,9 @@ static inline bool snd_soc_acpi_sof_parent(struct device *dev)
 		!strncmp(dev->parent->driver->name, "sof-audio-acpi", strlen("sof-audio-acpi"));
 }
 
+bool snd_soc_acpi_sdw_link_slaves_found(struct device *dev,
+					const struct snd_soc_acpi_link_adr *link,
+					struct sdw_extended_slave_id *ids,
+					int num_slaves);
+
 #endif

sound/soc/soc-acpi.c

@@ -125,5 +125,78 @@ struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
 }
 EXPORT_SYMBOL_GPL(snd_soc_acpi_codec_list);
 
+#define SDW_CODEC_ADR_MASK(_adr) ((_adr) & (SDW_DISCO_LINK_ID_MASK | SDW_VERSION_MASK | \
+				  SDW_MFG_ID_MASK | SDW_PART_ID_MASK))
+
+/* Check if all Slaves defined on the link can be found */
+bool snd_soc_acpi_sdw_link_slaves_found(struct device *dev,
+					const struct snd_soc_acpi_link_adr *link,
+					struct sdw_extended_slave_id *ids,
+					int num_slaves)
+{
+	unsigned int part_id, link_id, unique_id, mfg_id, version;
+	int i, j, k;
+
+	for (i = 0; i < link->num_adr; i++) {
+		u64 adr = link->adr_d[i].adr;
+		int reported_part_count = 0;
+
+		mfg_id = SDW_MFG_ID(adr);
+		part_id = SDW_PART_ID(adr);
+		link_id = SDW_DISCO_LINK_ID(adr);
+		version = SDW_VERSION(adr);
+
+		for (j = 0; j < num_slaves; j++) {
+			/* find out how many identical parts were reported on that link */
+			if (ids[j].link_id == link_id &&
+			    ids[j].id.part_id == part_id &&
+			    ids[j].id.mfg_id == mfg_id &&
+			    ids[j].id.sdw_version == version)
+				reported_part_count++;
+		}
+
+		for (j = 0; j < num_slaves; j++) {
+			int expected_part_count = 0;
+
+			if (ids[j].link_id != link_id ||
+			    ids[j].id.part_id != part_id ||
+			    ids[j].id.mfg_id != mfg_id ||
+			    ids[j].id.sdw_version != version)
+				continue;
+
+			/* find out how many identical parts are expected */
+			for (k = 0; k < link->num_adr; k++) {
+				u64 adr2 = link->adr_d[k].adr;
+
+				if (SDW_CODEC_ADR_MASK(adr2) == SDW_CODEC_ADR_MASK(adr))
+					expected_part_count++;
+			}
+
+			if (reported_part_count == expected_part_count) {
+				/*
+				 * we have to check unique id
+				 * if there is more than one
+				 * Slave on the link
+				 */
+				unique_id = SDW_UNIQUE_ID(adr);
+				if (reported_part_count == 1 ||
+				    ids[j].id.unique_id == unique_id) {
+					dev_dbg(dev, "found %x at link %d\n", part_id, link_id);
+					break;
+				}
+			} else {
+				dev_dbg(dev, "part %x reported %d expected %d on link %d, skipping\n",
+					part_id, reported_part_count, expected_part_count, link_id);
+			}
+		}
+		if (j == num_slaves) {
+			dev_dbg(dev, "Slave %x not found\n", part_id);
+			return false;
+		}
+	}
+	return true;
+}
+EXPORT_SYMBOL_GPL(snd_soc_acpi_sdw_link_slaves_found);
+
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("ALSA SoC ACPI module");

sound/soc/sof/intel/hda.c

@@ -1429,78 +1429,6 @@ static void hda_generic_machine_select(struct snd_sof_dev *sdev,
 
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
 
-#define SDW_CODEC_ADR_MASK(_adr) ((_adr) & (SDW_DISCO_LINK_ID_MASK | SDW_VERSION_MASK | \
-				  SDW_MFG_ID_MASK | SDW_PART_ID_MASK))
-
-/* Check if all Slaves defined on the link can be found */
-static bool link_slaves_found(struct device *dev,
-			      const struct snd_soc_acpi_link_adr *link,
-			      struct sdw_intel_slave_id *ids,
-			      int num_slaves)
-{
-	unsigned int part_id, link_id, unique_id, mfg_id, version;
-	int i, j, k;
-
-	for (i = 0; i < link->num_adr; i++) {
-		u64 adr = link->adr_d[i].adr;
-		int reported_part_count = 0;
-
-		mfg_id = SDW_MFG_ID(adr);
-		part_id = SDW_PART_ID(adr);
-		link_id = SDW_DISCO_LINK_ID(adr);
-		version = SDW_VERSION(adr);
-
-		for (j = 0; j < num_slaves; j++) {
-			/* find out how many identical parts were reported on that link */
-			if (ids[j].link_id == link_id &&
-			    ids[j].id.part_id == part_id &&
-			    ids[j].id.mfg_id == mfg_id &&
-			    ids[j].id.sdw_version == version)
-				reported_part_count++;
-		}
-
-		for (j = 0; j < num_slaves; j++) {
-			int expected_part_count = 0;
-
-			if (ids[j].link_id != link_id ||
-			    ids[j].id.part_id != part_id ||
-			    ids[j].id.mfg_id != mfg_id ||
-			    ids[j].id.sdw_version != version)
-				continue;
-
-			/* find out how many identical parts are expected */
-			for (k = 0; k < link->num_adr; k++) {
-				u64 adr2 = link->adr_d[k].adr;
-
-				if (SDW_CODEC_ADR_MASK(adr2) == SDW_CODEC_ADR_MASK(adr))
-					expected_part_count++;
-			}
-
-			if (reported_part_count == expected_part_count) {
-				/*
-				 * we have to check unique id
-				 * if there is more than one
-				 * Slave on the link
-				 */
-				unique_id = SDW_UNIQUE_ID(adr);
-				if (reported_part_count == 1 ||
-				    ids[j].id.unique_id == unique_id) {
-					dev_dbg(dev, "found %x at link %d\n", part_id, link_id);
-					break;
-				}
-			} else {
-				dev_dbg(dev, "part %x reported %d expected %d on link %d, skipping\n",
-					part_id, reported_part_count, expected_part_count, link_id);
-			}
-		}
-		if (j == num_slaves) {
-			dev_dbg(dev, "Slave %x not found\n", part_id);
-			return false;
-		}
-	}
-	return true;
-}
-
 static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev)
 {
 	struct snd_sof_pdata *pdata = sdev->pdata;
@@ -1544,7 +1472,9 @@ static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev
 				 * Try next machine if any expected Slaves
 				 * are not found on this link.
 				 */
-				if (!link_slaves_found(sdev->dev, link, hdev->sdw->ids, hdev->sdw->num_slaves))
+				if (!snd_soc_acpi_sdw_link_slaves_found(sdev->dev, link,
+									hdev->sdw->ids,
+									hdev->sdw->num_slaves))
 					break;
 			}
 			/* Found if all Slaves are checked */